Does anyone know if there is an interaction between apples and Focalin?

I should have stated I can't find anything between apples and Focalin on the web when I look up food interactions; however, it is as though my Focalin doesn't work after I've eaten an apple, which I used to do to boost my focus and energy levels when my Strattera would wear off. There is a link; I just can't find it. I'm willing to experiment on myself, but was hoping someone would know about this before having to do that.